Update ---- bf didn't realize, like on a scale of 1 to 10, how much I was upset about our busy schedules keeping us apart --- He thought I was only a 6 or 7, but I was really a 10!
He's going to make a good effort to write more often --
Also he explained that he gets upset when I call when he's in the middle of something because then he knows he can't talk to me. But he says that now he's just going to say he's unhappy that we can't talk, and not get moody on me.
Lastly he explained that he doesn't keep in contact with old friends because he didn't choose his friends well in the past, and those relationships were in a sense abusive relationships. So that's why I was thinking he was poor at keeping in touch/communicating.
So that's good news, we'll see how he follows through --- thanks everyone! I needed the push to put myself out there again in an assertive way, thanks! I was definitely being too passive, or passive-aggressive!